Question

решите уравнение 7(2x-1)+15=12x+4

Answer 1

7( 2x - 1 ) + 15 = 12x + 4
14х - 7 + 15 = 12х + 4
14х + 8 = 12х + 4
14х - 12 х = -8 + 4
2х = -4
х = $frac{-4}{2}$ = -2
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7 ( 2 × (-2) - 1 ) + 15 = 12 × (-2) + 4